T.A. McCann, who headed all social networks at BlackBerry, left two weeks ago, according to a person familiar with the matter. Marc Gingras, who was tasked with retooling the calendar and contacts applications for BlackBerry 10, the phone maker’s new operating system, also left in recent weeks, according to these people.

BlackBerry had tried to convince both men to stay, according to these people. According to people familiar with the matter, Gingras was the driving force behind one of the more well-received features of the new phones: the “hub.”

The Journal reported yesterday that Richard Piasentin, the company’s vice president for sales in the U.S., was fired last month.